EP 0314370 A3 19910731 - BOUNDED LAG DISTRIBUTED DISCRETE EVENT SIMULATION METHOD AND APPARATUS
Title (en)
BOUNDED LAG DISTRIBUTED DISCRETE EVENT SIMULATION METHOD AND APPARATUS
Publication
Application
Priority
US 11436987 A 19871028
Abstract (en)
[origin: EP0314370A2] A discrete event simulation system that avoids all blocking and advances the simulation time in an efficient manner by treating the simulated system as a set of subsystems and simulating the subsystems concurrently. The simulation proceeds iteratively by restricting the simulation of scheduled events for each subsystem at any one time to a chosen simulated time segment (bounded lag) beginning with the lowest simulation time found among the subsytems. With each simulation iteration, an "at risk" demarcation time is evaluated based only on a subset of the subsystems that can potentially affect the simulation at the considered subsytem. Events scheduled for a time earlier than the "at risk" time are simulated. In simulating systems where some subsystems affect other subsystems only through intermediate subsystems, opaque periods can be experienced when, because of the specific process that is being simulated, such an intermediate subsystem "promises" that a particular route maintaining from this subsystem would be busy for a set period of time, and thereby also "promises" that no other subsystem can use this route as a conduit to affect other subsytems. That tends to push forward the "at risk" demarcation time.
IPC 1-7
IPC 8 full level
G06F 19/00 (2006.01); G06F 17/50 (2006.01)
CPC (source: EP US)
G06F 30/20 (2020.01 - EP US)
Citation (search report)
- [A] 1986 WINTER SIMULATION CONF. PROC., Washington, DC, 8th - 10th December 1986, pages 417-423, IEEE, New York, US; D.W. JONES: "Concurrent simulation: An alternative to distributed simulation"
- [A] IEEE TRANS. ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS, vol. CAD-2, no. 2, April 1983, pages 82-93; M. ABRAMOVICI et al.: "A logic simulation machine"
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 0314370 A2 19890503; EP 0314370 A3 19910731; EP 0314370 B1 19960124; CA 1294046 C 19920107; DE 3854935 D1 19960307; DE 3854935 T2 19960919; IL 88146 A0 19890630; IL 88146 A 19920329; JP H01155462 A 19890619; JP H0697451 B2 19941130; US 4901260 A 19900213
DOCDB simple family (application)
EP 88309768 A 19881019; CA 581027 A 19881024; DE 3854935 T 19881019; IL 8814688 A 19881025; JP 27105688 A 19881028; US 11436987 A 19871028